Lexus RX350 2023 Manual page 298

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298
4-5. Using the driving support systems
• The driver's door is closed.
• The windshield defogger is off.
• The accelerator pedal is not being
depressed.
• The engine is adequately warmed up.
• The hood is closed. (P.298)
In the following situations the engine may
not be stopped by the Stop & Start sys-
tem. This is not a malfunction of the Stop
& Start system.
• When the air conditioning system is
being used.
• When the battery is undergoing a peri-
odic recharge.
• When the battery is not sufficiently
charged, such as if the vehicle has been
parked for a long time and the battery
charge has decreased, the electric load is
large, the battery fluid temperature is
excessively low or the battery has deteri-
orated.
• When the brake booster vacuum is low.
• When the elapsed time since the engine
was restarted is short.
• When the vehicle is stopped frequently,
such as when in a traffic jam.
• When the engine coolant temperature or
transmission fluid temperature is
extremely low or high.
• When the vehicle is stopped on a steep
incline.
• When the vehicle is being driven in a high
altitude area.
• When the battery fluid temperature is
extremely low or high.
• For a while after the battery have been
replaced
When the engine is stopped by the Stop
& Start system, the engine will be
restarted automatically if any of the fol-
lowing conditions are met: (To enable the
engine to be stopped by the Stop & Start
system again, drive the vehicle.)
• The air conditioning system is being used.
• The windshield defogger is turned on.
• The shift lever is shifted from D or P.
• The shift lever is shifted from P. (When
the engine is stopped by the Stop & Start
system when the shift lever is in P.)
• The driver's seat belt is unfastened.
• The driver's door is opened.
• The Stop & Start cancel switch is pressed.
• Advanced Park is operated. (if equipped)
• The accelerator pedal is depressed.
• The vehicle starts to roll on an incline.
When the engine is stopped by the Stop
& Start system, the engine may restart
automatically in the following situations:
(To enable the engine to be stopped by
the Stop & Start system again, drive the
vehicle.)
• When the brake pedal is pumped or
strongly depressed.
• When the air conditioning system is
being used.
• When a switch of the air conditioning sys-
tem is operated (windshield defogger
switch, etc.).
• If the battery charge becomes low.
When the hood is opened
If the hood is opened while the engine is
stopped by the Stop & Start system, the
engine will stall and will not be able to be
restarted by the automatic engine start
function. In this case, restart the engine
using the normal engine starting proce-
dure. (P.194)
If the hood is closed after the engine is
started with the hood open, the Stop &
Start system will not operate. Close the
hood, turn the engine switch off, wait 30
seconds or more, and then start the
engine.
Air conditioning system operation while
the engine is stopped by the Stop &
Start system
When the air conditioning is in automatic
mode and the engine is stopped by the Stop
& Start system, the fan may operate at a low
speed in order to prevent the temperature
in the cabin from increasing or decreasing
or may be stopped.
To prioritize air conditioning system perfor-
mance when the vehicle is stopped, disable
the Stop & Start system by pressing the
Stop & Start cancel switch.
If the windshield is fogged up
Turn the windshield defogger on.
(P.385)
If the windshield fogs up frequently, press
the Stop & Start cancel switch to disable
the Stop & Start system.

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